package com.atguigu.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
import reactor.core.publisher.SignalType;

import java.util.function.Consumer;

//响应时间全局过滤器
@Component
@Slf4j
public class RtGlobalFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String uri = request.getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求【{}】开始,时间：{}", uri, start);
        //==============================以上前置逻辑==========================
        //放行
        Mono<Void> voidMono = chain.filter(exchange).doFinally(signalType -> {
            //==============================以下后置逻辑==========================
            long end = System.currentTimeMillis();
            log.info("请求【{}】结束,耗时：{}", uri, end - start);
        });

        return voidMono;
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
